Identifying grass or twigs used in bird nests involves observing specific characteristics of the materials. Here are some tips to help you identify them:

Grass Identification:

1. Color: Look for the shades of green or brown. Fresh grass is usually vibrant green, while dried grass may appear brownish.

2. Texture: Check for softness and flexibility. Many grasses are soft, while others may be coarse.

3. Length: Observe the length of the blades. Bird nests often incorporate shorter pieces, about 5-30 cm in size.

4. Type: Identify the species of grass. Common nesting grasses include:

- Timothy grass: Has long, slender blades.

- **Orchard grass**: Features broad blades and a more dense appearance.

Twig Identification:

1. Thickness: Notice the diameter. Twigs in nests are usually thin, about 1-5 mm.

2. Bark: Look at the surface texture. Some twigs are smooth while others may have rough bark.

3. Color: Take note of the colors, which may range from brown to gray depending on the tree species.

4. Branching: Observe any branching pattern or leaf scars. Twigs from certain trees have distinctive features.

5. Type: Common nesting twigs come from:

- Willow: Flexible and often slender.

- Birch: Smooth with a lighter color.

General Tips:

- Habitat: Consider the habitat where the nest is found. Certain species prefer specific plants based on availability.

- Proximity to Nest: Examine materials in close proximity to bird nests as they may indicate the nesting species.

- Aging: Determine if the materials are fresh or old; newly gathered materials are often more vibrant.

Collecting samples and using a field guide can also assist in accurate identification. Observing birds while they gather nesting materials can provide insights into their preferences as well.

Bonsoir!

• L'identification des herbes prélevées et utilisées (pour des nids d'oiseaux comme c'est le cas) doit être à mon sens faire l'objet d'une identification au laboratoire.
• L'espèce végétale extraite est étalée (conservée en herbier),
• L'observation minutieuse s'articulera sur les pièces florales (à voir et à comparer à partir des flores classiques où les sujets sont décrits, parfois dessinés et également photographiés avec des détails sur la morphologie, sur l'appareil aérien, etc....,
• Souvent il est fait appel à des botanistes dans ce cas.

Bonne chance! Good luck!